Find control points only for the added image

[Abrimaal]

I added one more image to an existing panorama. Now I want to find control points only for this image (no. 6) , it means
6 and 0

6 and 1

6 and 2

6 and 3

6 and 4

6 and 5

vertical line detection only for image 6

When I select image 6 and right click, there is no "Find control points" for this image only.
So I use "Find control points" with only image 6 selected.

The detector starts the search once again for all images 0 and 1, 0 and 2 and so on.

To avoid duplication of existing control points, I want to skip finding control points for images that are already connected, only for the added image.

Can I do this?

Comparing the stats, we see that all points for already connected images have been duplicated.

[AKS-Gmail-IMAP]

“Find control points” operates on the selected images. It assumes you want the operation to apply to all the images when no images are selected because “none means all” makes perfect sense most of the time in most workflows.

In your case when you add image 6 and for example you only want to find control points between image 6, image 5 and image 1, then select only those images in the image list prior to invoking the “Find control points” operation. Control points will be found between only the selected images.

I don’t know if there is a delete duplicate control points command. I’ve made the same mistake and also wanted to delete duplicate control points. You can view the control points as a list table (F3 is the short cut). There are sorting features in that table that can help you to identify the duplicate points. Deleting points is easy to do within the table view. The control points list goes way back in the Hugin interface but it almost seems ignored in the current menu structure. With its sorting features one could easily spot the zinger control point that should not be or edge matchings that would skew a stitch.

On Sep 9, 2019, at 10:32 AM, Abrimaal <abri...@wp.pl> wrote:

I added one more image to an existing panorama. Now I want to find control points only for this image (no. 6) , it means
6 and 0

6 and 1

6 and 2

6 and 3

6 and 4

6 and 5

vertical line detection only for image 6

When I select image 6 and right click, there is no "Find control points" for this image only.
So I use "Find control points" with only image 6 selected.

<hugin how to find control points for added img.png>

The detector starts the search once again for all images 0 and 1, 0 and 2 and so on.

To avoid duplication of existing control points, I want to skip finding control points for images that are already connected, only for the added image.

Can I do this?

Comparing the stats, we see that all points for already connected images have been duplicated.

<hugin control points duplicated.png>

--
A list of frequently asked questions is available at: http://wiki.panotools.org/Hugin_FAQ
---
You received this message because you are subscribed to the Google Groups "hugin and other free panoramic software" group.
To unsubscribe from this group and stop receiving emails from it, send an email to hugin-ptx+...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/hugin-ptx/ee72a266-1598-4db1-beb5-5f3205b3af7a%40googlegroups.com.
<hugin how to find control points for added img.png><hugin control points duplicated.png>

[Abrimaal]

“None means all” - this is perfectly logical and intuitive,
I selected image 6 to find points between image 6 and ALL the rest 6+0, 6+1, 6+2, 6+3, 6+4, 6+5
but NOT between 1+2, 1+3... ... 4+5
Duplicated control points are not a problem, they don't change geometry, but it takes a lot of time to calculate.
(and when you don't have to remove more control points manually).

Maybe I should try to select 6+0 and "Find control points", then 6+1 and find and repeat the step until 6+5.
I will try next time, maybe this will avoid duplicates between images connected before.

To unsubscribe from this group and stop receiving emails from it, send an email to hugi...@googlegroups.com.

[Erik Krause]

Am 10.09.2019 um 03:16 schrieb Abrimaal:

> I selected image 6 to find points between image 6 and ALL the rest
> 6+0, 6+1, 6+2, 6+3, 6+4, 6+5 but NOT between 1+2, 1+3... ... 4+5

If you have a panorama with aligned images and you add another image it
usually is sufficient to create control points between this image and
one or two other images. However, it is good practice to add all images
to a project, then specify which of those should be treated specially,
(f.e. by viewpoint correction), then press Align.

> Duplicated control points are not a problem, they don't change geometry,
> but it takes a lot of time to calculate.

PTGui doesn't create duplicate points, it always creates additional ones.

--
Erik Krause
http://www.erik-krause.de

[Abrimaal]

Yes, I selected only the neighbouring images. This is an example of adding 2 images to a 29 image panorama that had a "black hole" inside.
These 2 added images were from a different photo sequence and they covered the black hole.
Finding points for all images would take hours. Thanks for explaining how the selection works.

Maybe the points are not duplicated pixel to pixel, but most of these are in the same places. When deleting one point, there is usually another one below.

Finding points only for selected images will prevent this.